Improvement in steam vacuum-pumps



C. H. HALL. in Steam Vacuum-Pumps.

Patented Sep. 24, 1872.

mmmm

IMI/047717) Improvement IIl//l/l/// um. P/raro-L/wfaaMM/c van, x/ossaawsk Mauss) rra CHARLES II. HALL, OF NEW YORK, N. Y.

IMPROVEMENT IN STEAM VACUUMePUMPS.

CASE D.

To all whom it may concern:

Be it known that I, CHARLES-H. HALL, of the city, county, and State of New York, have invented a new and useful Improvement in Vacuum-Pumps, and I do. hereby declare the following to be a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, reference being had to the accompanying drawing forming part of this specification, in which drawing- Figure l represents a longitudinal vertical section of this invention in the plane wa, Fig. 3. Fig. 2 is a similar section of the same' in the plane y y, Fig. 4. Fig. 3 is a horizontal section of the same in the plane z z, Fig. l. Fig. 4 is a similar section of the same in the plane .r1 m1, Fig. l, looking in the direction of the arrow opposite to that line. Fig. 5 is a transverse vertical section in the plane z z', Fig. 3. Fig. 6 is a similar section in the plane y y', Fig. 3; and Fig. 7 is a horizontal section ofthe apparatus in the plane x2 m2, Fig. 1.

Similar letters indicate corresponding parts.

This invention relates to certain improvements on that class of vacuum-pumps which I have described in an application for a patent iled in the Patent Ofiice on or about the 31st day of August, 1871. These improvements consist in combining the pistons, which insure the alternating action of the two groups ot' chambers, with the plugs of stop-cocks or faucets, controlling the admission of steam to the working-chambers in such a manner that the time when said cocks open or close is governed entirely by the positive motion` of the alternating pistons; also, in the combination of a balance-lever with the alternating pistons in such a manner that if one piston rises the other must descend, and vice versa, and by these means the alternating action of the said pistons, and consequently that of the two groups of chambers,is insured without fail.

In the drawing, the letters A A designate two Working-ch ambers in which the pulsations of steam and water or other liquid takes place, said chambers filling and discharging alternately, as will be hereinafter explained. They are made by preference in the form of cylinders with conical tops, cast in one piece, and

standing on their fiat bottoms; but they may be constructed in any other desirable form or shape and cast in one or more pieces. Between the working-chambers A A are situated two intermediate chambers, B B, which are separated from each other by a partition, c,

(see Figs. 4 and 7,) and which communicate with the working-chambers vA A', respectively, through apertures b b. (See Figs. 1, 4, and 5.) Over the top of the chambers B Bl extends a horizontal partition, e, which separates the same from the receiving-chamber E and from the discharge-chamber F. The receivingchamber communicates with the supply-pipe G and with a chamber above, which latter is divided by a transverse partition, f, in two receiving-valve chambers, gg', (see Fig. 3,) which communicate through apertures h h with the intermediate chambers B B. The dischargechamber F communicates with the dischargepipe H, and it is provided with two valves, l l', which are separated from each other by the partition a between the chambers B B', as indicated in Figs. 3 and 7. Each ofthe receiving-valve chambers g g is provided with a valve, k k', so arranged that the liquid admitted through the supply-pipe can open said valves and pass into the chamber B B', but the liquid flowing out of said chambers will close the valves 7c 7c so that it cannot return to the supply-pipe. The valvesl Z of the discharge-chamber F are so arranged that they allow the liquid to pass from the chambers B B to the discharge-pipe, but prevent its return from the disch arge-pipe to said chambers.

The working chambers are supplied with steam through a common steam-pipe, u, which branches off so as to connect with said working-chambers, as shown in Figs. 1 and 2, said bra'nches extending down into the workingchambers far enough to make room for stopcocks 0 o', which govern the supply of steam, the ends of the pipe being curved up so as to cause the steam discharging from the same to impin ge against the tops of the chambers, and not directly against Vthe surface of the liquid. The plugs of the stop-cocks o o' connect, by rods p p', with levers q q', (best seen in Figs. 1 and 4.) These levers are situated in the bottom parts of the working-chambers, and they extend out through the apertures L', leading into the intermediate chambers B B. The outer ends of the levers q q connect, by links i" rf, with pistons tt', working in cylinders s s', extending down below the bedplate of the apparatus. These cylinders connect, near their bottom ends, by a passage, u, (see Fig. 6,) which forms the sole connection between the two groups of chambers. The pistons t t' are connected by a balance-lever, o, which has its fulcrum on a pivot, o', Fig. 6, and which compels one piston to rise when the other descends, and vice versa.

The operation is as follows: First, I place the apparatus in a suitable position with reference to the liquid to be pumped, takin g care to keep the same within the elevation perpendicularly to which said liquid would be raised by the atmospheric pressure. I then connect the suction-pipe or supply-pipe G with the tank, well, or reservoir containing the liquid, and provide said pipe with a suitable foot- Valve, (not represented,) and the delivery-pipe H I connect with or lead over so as to dis-v charge into the receptacle into which the liquid is to be pumped. The steam-pipe n I conneet with a suitable steam generator, and then I lill the apparatus with the liquid to be pumped, which may be done by pouring it into the valve-openin gs g g', and after securing the valves again in their places and screwing their caps in tight the apparatus is ready to be started. Before admitting steam through the pipe a, however, care must be taken that one of the stop-cocks o, for instance, shall be open. The steam, on passing into the top of the chamber A, forces the liquid contained in said chamber out through the aperture b into the intermediate chamber, and thence out through the discharge-valve chamber F and the delivery-pipe H. As soon as the liquid in the work.

ing-chamber A has descended low enough to allow the steam to pass through the aperture b into the intermediate chamber, said steam, being now compelled to mix with the liquid, condenses immediately, and by the suction of the vacuum thus produced in the workingchamber A the piston t is caused to rise, thereby depressing the piston t', and the stop-cock 0 is closed, while the stop-cock o is opened. By the suction of the vacuum a fresh supply of liquid is drawn into the chambers A B, while at the same time the steam passing into the chamber A through the open cock o causes this last-named chamber to discharge.

By the peculiar arrangement of the stopcocks o o and of their connections the cock o will remain closed as long as the cock o remains open, and vice versa, and the chamber A will not commence to discharge until the chamber A has been emptied, and by the condensation of the steam in the chamber the cock o is closed and the cock o opened. The alternate action of the two groups of charnbers is secured without fail, and a steady stream of liquid discharges through the delivery-pipe H.

What I claim as new, and desire to secure by Letters Patent, is

l. The stop-cocks o o', having their plugs connected to levers q q, in combination with the alternating pistons t t and with the chambers A B A B, substantially in the manner herein shown and described.

2. The lever U, in combination with the alternating pistons t t, cylinders s s', and connectin g-passage u, and with the workin g-chambers A A, substantially as set forth.

(l. H. HALL.

Witnesses:

W. HAUFF, E. F. KAsTENHUBER. 

